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Nightbrew · 05-02-2012, 12:42 AM

Wouldnt the size need to be different for low pressure propane? Also Onehoppguy I would love to hear more about your tests.

**OneHoppyGuy** · 05-02-2012, 01:14 AM

The size I quoted was for low pressure. We haven't done efficiency tests, just flame quality. The goal was to achieve the cleanest/best flame by stepping up orifice sizes until we hit a peak performance. With that said, I believe it would be fairly safe to assume you would also get the highest efficiency.

mmurray · 05-02-2012, 01:40 AM

And my next question, what pressure regulator are you running? 10psi as opposed to highpressure 30psi?

Also, as we have discussed before, I am placing my needle valves just before the orifice on the burner so would I just pressurize the maifold to the low pressure setting (10psi for arguments sake) and then fine tune with the needle valve all 3 burners?

**Warrior** · 05-02-2012, 02:03 AM

I just posted my pics on my new shop brewery page showing my new three tier brewstand. 3 burners running at the same time on natural gas. With the low pressure regulator of only 11 water colume inches the .125 size should work fine. I lost one of my valves and had to use a brass valve that was 1/4 in pipe thread for the burner connection and 3/8 flare to adapt the hose connection. I tried the existing hole size but it didn't have a good flame. I ended up using a 1/8 pipe plug that i threaded into the 1/4 brass connection. I used a 1/8 pipe tap which worked nicely with the internal hole size of the brass 1/4 fitting. I then drilled a 1/8 hole in the plug for the proper size on the gas flow. It works as good as the valves I bought from williams.

Nightbrew · 05-02-2012, 02:04 AM

mmurray--I believe that you have to be about .5psi to be low pressure, or so I think I have recently learned.

**OneHoppyGuy** · 05-02-2012, 02:04 AM

I think we're talking apples and oranges here.
10 psi is considered high pressure. Low pressure for LP is 11" W.C. and uses a low pressure non-adjustable regulator.
11" W.C. (water column - measurement taken with a manometer) is the pressure used for furnace gas valves if you are automating burners.

If you are trying to save fuel by reducing your regulator pressure you will experience some savings but the burner you are using isn't designed for efficiency. Rather, it's designed for high BTU output. If you truly want efficiency, go all electric.